blocks|key|509434|text|我对时区之类的东西有严重的问题。Python处理所有这些事情的方式(对我来说)非常令人困惑。使用日历模块似乎运行得很好(参见链接1、2、3和4)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|509435|>>>+import+datetime
>>>+import+calendar
>>>+aprilFirst=datetime.datetime(2012,+04,+01,+0,+0)
>>>+calendar.timegm(aprilFirst.timetuple())
1333238400|code-block|syntax|javascript|509436|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/2956886/python-calendar-timegm-vs-time-mktime|1|http://docs.python.org/library/calendar.html|2|https://stackoverflow.com/questions/4046401/how-do-i-convert-a-datetime-to-a-utc-timestamp-in-python|3|http://www.epochconverter.com/^0|1S|1|0|1U|1|1|1W|1|2|1Y|1|3|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]|$A|10|B|11|1|12]|$A|13|B|14|1|15]|$A|16|B|17|1|18]]|C|$]]|$1|D|3|E|5|F|7|19|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]|S|$5|L|M|N|C|$O|T]]|U|$5|L|M|N|C|$O|V]]]]

I had serious issues with Timezones and such. The way Python handles all that happen to be pretty confusing (to me). Things seem to be working fine using the calendar module (see links <a href="https://stackoverflow.com/questions/2956886/python-calendar-timegm-vs-time-mktime">1</a>, <a href="http://docs.python.org/library/calendar.html" rel="noreferrer">2</a>, <a href="https://stackoverflow.com/questions/4046401/how-do-i-convert-a-datetime-to-a-utc-timestamp-in-python">3</a> and <a href="http://www.epochconverter.com/" rel="noreferrer">4</a>).

<pre><code>&gt;&gt;&gt; import datetime
&gt;&gt;&gt; import calendar
&gt;&gt;&gt; aprilFirst=datetime.datetime(2012, 04, 01, 0, 0)
&gt;&gt;&gt; calendar.timegm(aprilFirst.timetuple())
1333238400
</code></pre>

blocks|key|509598|text|import+time
from+datetime+import+datetime
now+=+datetime.now()

time.mktime(now.timetuple())|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|509599|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>import time
from datetime import datetime
now = datetime.now()

time.mktime(now.timetuple())
</code></pre>

blocks|key|509632|text|import+time
from+datetime+import+datetime
now+=+datetime.now()

#+same+as+above+except+keeps+microseconds
time.mktime(now.timetuple())+%2B+now.microsecond+*+1e-6|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|509633|(抱歉，它不让我对现有答案发表评论)|unstyled|509634|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>import time
from datetime import datetime
now = datetime.now()

# same as above except keeps microseconds
time.mktime(now.timetuple()) + now.microsecond * 1e-6
</code></pre>

(Sorry, it wouldn't let me comment on existing answer)

blocks|key|509699|text|这在Python+2和3中有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|509700|>>>+import+time
>>>+import+calendar
>>>+calendar.timegm(time.gmtime())
1504917998|code-block|syntax|javascript|509701|只是按照官方的文件...https://docs.python.org/2/library/time.html#module-time|offset|length|509702|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.python.org/2/library/time.html#module-time^0|0|0|C|1J|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

This works in Python 2 and 3:

<pre><code>&gt;&gt;&gt; import time
&gt;&gt;&gt; import calendar
&gt;&gt;&gt; calendar.timegm(time.gmtime())
1504917998
</code></pre>

Just following the official docs...
<a href="https://docs.python.org/2/library/time.html#module-time" rel="nofollow noreferrer">https://docs.python.org/2/library/time.html#module-time</a>

blocks|key|509772|text|如果你只需要一个unix+/epoch时间的时间戳，下面这行代码行得通：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|509773|created_timestamp+=+int((datetime.datetime.now()+-+datetime.datetime(1970,1,1)).total_seconds())
>>>+created_timestamp
1522942073L|code-block|syntax|javascript|509774|并且只依赖于在python2和python3中工作的datetime|offset|length|style|CODE|509775|entityMap^0|0|0|Q|8|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

if you just need a timestamp in unix /epoch time, this one line works:

<pre><code>created_timestamp = int((datetime.datetime.now() - datetime.datetime(1970,1,1)).total_seconds())
&gt;&gt;&gt; created_timestamp
1522942073L
</code></pre>

and depends only on <code>datetime</code>
works in python2 and python3

blocks|key|293316|text|对于显式的与时区无关的解决方案，请使用pytz库。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|293317|import+datetime
import+pytz

pytz.utc.localize(datetime.datetime(2012,4,1,0,0),+is_dst=False).timestamp()|code-block|syntax|javascript|293318|输出(浮点数)：1333238400.0|293319|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

For an explicit timezone-independent solution, use the pytz library.

<pre><code>import datetime
import pytz

pytz.utc.localize(datetime.datetime(2012,4,1,0,0), is_dst=False).timestamp()
</code></pre>

Output (float): 1333238400.0

I have a time in UTC from which I want the number of seconds since epoch.

I am using strftime to convert it to the number of seconds. Taking 1st April 2012 as an example.

<pre><code>&gt;&gt;&gt;datetime.datetime(2012,04,01,0,0).strftime('%s')
'1333234800'
</code></pre>

1st of April 2012 UTC from epoch is 1333238400 but this above returns 1333234800 which is different by 1 hour. 

So it looks like that strftime is taking my system time into account and applies a timezone shift somewhere. I thought datetime was purely naive?

How can I get around that? If possible avoiding to import other libraries unless standard. (I have portability concerns).

Convert python datetime to epoch with strftime

Python

我在UTC中有一个时间，我想知道从纪元开始的秒数。我使用strftime将其转换为秒数。以2012年4月1日为例。>>>datetime.datetime(2012,04,01,0,0).strftime('%s')'1333234800'2012年4月1号UTC从纪元返回的是1333238400，但上面的返回值是13...

问使用strftime将python日期时间转换为纪元
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